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Debt And Credit Facilities-Credit facilities- (Details) - CAD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of detailed information about borrowings [line items]
Total credit facilities	$ 8,398.0
Total unutilized credit facilities	3,898.0
Available credit facilities for liquidity purposes	3,608.0	$ 4,489.0
Fully revolving and expires in 2021
Disclosure of detailed information about borrowings [line items]
Total credit facilities	4,000.0
Fully revolving and expires in 2020
Disclosure of detailed information about borrowings [line items]
Total credit facilities	2,729.0
Fully revolving and expires in 2019/2020
Disclosure of detailed information about borrowings [line items]
Total credit facilities	1,537.0
Can be terminated at any time at the option of the lenders
Disclosure of detailed information about borrowings [line items]
Total credit facilities	132.0
Credit facilities supporting outstanding commercial paper
Disclosure of detailed information about borrowings [line items]
Credit facilities assigned	(3,231.0)
Credit facilities supporting standby letters of credit
Disclosure of detailed information about borrowings [line items]
Credit facilities assigned	(1,269.0)
Cash collateral	$ 108.0	$ 733.0

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]

+ References

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- Definition

Represents the amount of cash provided towards collateral for credit facilities.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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- Definition

Represents the portion of line of credit facilities that are assigned for specific purposes.

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No definition available.

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- Definition

The amount of undrawn borrowing facilities for liquidity purposes that may be available for future operating activities and to settle capital commitments.

+ References

No definition available.

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